Calculating machine



0 1935. H. J. DUKE 2,010,068

CALCULATING MACHINE Original Filed May 28, 1932 4 Sheets-Sheet 1 YNVENTOR hfwvzie/ I page (j ,ATTORNEY Aug. 6, 1935.

H. J, DUKE CALCULATING MACHINE Original Filed May 28, 1932 4 Sheets-Sheet 2 V INVENTOR Ham 1' e JTDu/ffi ATTORNEY Aug. 6, 1935. H. .1. DUKE CALCULATING MACHINE Origin a1 Filed May 28, 1932 4 Sheets-Sheet 3 avwwltoz Aug. 6, H. J. DUKE CALCULATING MACHINE Original Filed May 28, 1932 4 Sheets-Sheet 4 INVENTOR Patented Aug. 6, 1935 PATENT OFFICE CALCULATING MACHINE Harvie .1. Duke, Orange, N. J., assignor to Gardner Company, Orange-N. J., a corporation of Delaware Refiled for abandoned application Serial No.

614,195, May 28, 1932. This application December 14, 1934, Serial No. 757,496

1 Claim.

The invention has relation to calculating machines, and more particularly to means for controlling the release of the preset digit keys of such a machine at the end of an operation. The present application is a substitute for application Serial No. 614,195, filed May 28, 1932, which became abandoned on May 3, 1933.

It is common to provide motor operated calculating machines with an operation key, which may be depressed and held depressed until the machine has operated for the desired number of cycles, to add or subtract the amount set in the keyboard a given number of times to or from the amount set in the accumulator. Upon manual release of such key, the machine will complete the cycle in which his operating, and the registering mechanism will thereupon be brought to rest. The present invention contemplates a digit key release mechanism which will operate in a similar manner and will be controlled from the above described registering operation key.

The invention consists in the novel construction and combination of parts, as set forth in the appended claim.

In the accompanying drawings, illustrating the invention:

' Fig. l is a longitudinal section through a calculating machine embodying the invention, showing the keyboard and registering mechanism thereof.

Fig. 2 is a similar view, showing the registration and key release control mechanism.

Fig. 3 is a similar view showing a modified operation key arrangement.

Fig. 4 is a detail side view of the locking plate and associated-parts.

Fig. 5 is a detail side view of the key release and non-release mechanism.

These drawings illustrate a machine of the Gardner type such as that disclosed in British Patent #293,080, and equipped with motor operating means, as disclosed in U. S. PatentNo. 1,932,013, October 24, 1933, to Loring P. Crosman.

Amounts to be registered in this machine are set up on the digit keys 2I5 (Fig. 1) which keys are latched in active depressed position by sliding locking plates 2I3. The registering mechanism is thereupon operated by imparting one or more reciprocations to shaft 30I, said shaft being provided with a frame 3I8 movable to allow operation of a series of three-armed levers 6I0, under the influence of springs 683. The upper arms of levers 6l0 are connected to a series of stop bars 6I5, having lugs adapted to contact with the depressed keys, in well known manner,

to limit the movement of the levers H0 in accordance with the amounts set up. The forward arms of levers 6 I 0 are provided with toothed segments engaging the pinions 412 of one or more accumulators. The rearward arms of levers 6I0 carry type bars 6II which are adapted to bring type to the printing line in accordance with the amounts set on the keyboard, suitable printing mechanism being provided for printing such amounts during the movement of shaft 30I.

Shaft 30I is driven from a motor I00, through clutch connection I40-I4I (Fig. 2), plate I05, rod I08 and arm 3I6 of said shaft. Normally clutch pawl MI is held out of engagement with clutch disc I40 by a lever I06, fulcrumed at I01 in the framing of the machine. Lever I06 has a spring tending to draw it out of engagement with pawl I4I, said spring being normally resisted by a latch II 2, engaging the upper end of the lever. Upon release of latch I I2 by the operation key, lever I06 will release pawl I4l, which pawl will then be thrown by a suitable spring into engagement with disc I40. Disc I40 is attached to a shaft constantly driven by motor I00, and pawl I 4| is pivotally mounted upon the plate I05, so that engagement of the clutch members I40I4I will result in the rocking of shaft 30I. Near the end of the first cycle of registering movement, a projection II5 of plate I05 will engage a projection H6 of lever I06, and will move said lever into position of engagement with latch H2, such engagement occurring if latch I I2 has been previously released by the operation key. Lever I06 being relatched, the lower end thereof will stand in the path of pawl I 4| so that upon further rotation of plate I05, the pawl will be disengaged and the driven parts held against further movement.

The digit keys 2I5 which are latched in depressed position by the engagement of suitable teeth on the slides 2I3 with notches in the keysterns, are released from the latching slides 2I3 by means of levers 2| 4 (Fig. 1) fulcrumed at 204 below the keyboard plate and having arms engaging suitable projections of the slides H3. The levers 2i4 are operated by a bail 221 pivoted at 252 (Figs. 2, 4, 5) in the framing of the machine.

Releasing bail 221 may be operated at any time by a correction key 212, the stem of said key engaging a pin 256 in the end plate of said bail. Means are also provided for moving the releasing bail 221 automatically during the last portion of a cycle of registering movement, said means comprising lever 321, connected by rod 32I with arm 3I6, the free end of lever 321 engaging a stud 222 connected with a rocker 22G, pivoted at 252 on the framing of the machine. Rocker 228 carries a pivoted hook 22 I, normally held by a suitable spring in position to engage a. pin 2&3 in the end plate of bail 227. In the forward reciprocation of shaft Bill, lever 321 will pass idly beyond pin 222, which is yieldably mounted on rocker 220, and upon the rearward reciprocation of shaft 3M lever 32?, contacting pin 222, will move rocker 22B and, through hook 221 and pin 263 will move the releasing bail 2211 to release the depressed keys.

The key which according to the present invention controls the registering and the key release mechanism may be associated with other keys controlling one or the other of said mechanisms, in various combinations. One such combination is illustrated in Fig. 2, wherein a registration and key release control key 562 is provided, said key being so arranged that other registration controlling keys, for instance, keys controlling plus and minus operation respectively, may operate, through latch l 92, without controlling the key release mechanism. Key I62 controls the key release mechanism as follows: A cam M3 on key N2 is adapted to contact with a stud on a slide plate 55, the other end of said plate having a tooth l5! (Figs. 4 and 5) engaging hook 22!. As key M2 is depressed plate M5 will be shifted, and tooth IE! will rock the hook 22H and hold the same out of engaging position with pin 263 of the key releasing ball 22?. Therefore, so long as this key is held depressed, the operation of lever 321 at the end of the cycle will be idle with respect to bail 221, and the digit keys 2 l 5 will remain depressed. Upon release of key M2, hook 2 will be pulled by its spring back into engaging position, so that the digit keys will be released upon the completion of the registration then being effected.

Key I42 controls latch 1 l2 by means of the cam I43 and slide 5, the latter, engaging the upper end of a lever M4, which lever has operative contact with a lug of latch I I2. Thus, so long as key H2 is held depressed latch H2 will be held out of engagement, and clutch lever 106 will not contact with clutch pawl I to disengage-the clutch.

An interlock is shown between key M2 and certain other operating keys of the machine. The keys illustrated comprise a sub-total key 213 and total key 218,. of well known. construction. A locking plate I46 (Fig. 4) has a lug engaging lever M4, and near its other end is provided with a second lug Ml, adapted when the lever its is moved to operative position to lie in the path of V e,oio,oes

the ends of key levers 213 and 218. A spring I52 returns locking plate M6 to normal position upon release of key I62. In the normal position of plate M6, depression of key 213 or key 278 will bring the end of the respective key lever in front of lug l ll, whereupon plate M6 will hold lever W5 and key Hi2 against operation.

Another combination of keys is illustrated in Fig. 3, wherein a plurality of operation keys, such as the usual plus and minus keys lid and 214, will control the key release mechanism as well as the registering mechanism, and wherein a nonrelease key 276 may be provided, said key having a notch which may be engaged with the keyboard plate to hold the parts in non-key releasing position, so that no automatic clearing of the keyboard will occur.

The plus key M l engages the end of a lever H3, similar to the lever M6, the minus key 2141 operating lever I I3 through an interposed lever I H. The locking plate M8 (illustrated in Fig. 4) has a lug engaging the end of lever H3, whereby the plate is operated as above described. Plate IE6 is also provided with a stud I49 engaging slide Hi5. Thus, upon operation of key H6 or key 214 lever H3 and plate M5 will move slide 1415. and bring the tooth of said slide against hook 22!, to move the hook out of engaging relation with pin 263, in which position the hook will be held so long as the depression of key H4 or key 214 holds the lever H3 in operating position. The lever H3 also operates latch H2 in the manner above described.

It may be noted that Figs. 4 and 5 illustrate mechanism common to both forms of the invention, except that pin 9, shown in Fig. 4 is omitted from the embodiment illustrated in Fig. 2.

I claim:

In a calculating machine having a motor, cyclic operating means, driving connections between said motor and said operating means, digit setting keys controlling entry of items, and key locks therefor; the combination with cyclically operatedineans for breaking the driving connections and bringing the registering means to rest, of cyclically operated means for releasing said key locks, timed for substantially simultaneous action with the connection breaking means, and a freely retractible device including an operation key disabling in manually set position said, connection breaking means and said lock releasing means, the breaking means and the releasing means being adapted to operate following manual release of said key.

- HARVIE J. DUKE. 

